What are some examples of system calls in operating systems?

What are some examples of system calls in operating systems?

System calls are the interface between a running program and the operating system. Examples include open(), read(), write(), and close().

Can you explain what the open() system call does?

The open() system call is used to open a file. It returns a file descriptor that can be used for reading or writing.

What about the read() system call?

The read() system call reads data from a file descriptor into a buffer. It returns the number of bytes read.

Are there any other important system calls I should know about?

Yes, other important system calls include write(), which writes data to a file, and close(), which closes an open file descriptor.